The drunken reveller turned on the 49-year-old doorman after being ejected from the premises.

But the fast-acting duo, who were on duty at nearby Club 147, crept up behind the attacker and tackled him to the floor after witnessing him pull out a knife.

Between them, the guards sat on the assailant until police arrived and the man was arrested on suspicion of wounding.

Steve, who has worked in security for 24 years and is employed by Cooney’s, was left shaken but escaped with minor injuries, including a cut above his eye.

Last night he thanked Jay and Rich for coming to his rescue as he recalled the harrowing incident. “A man had been ejected from the bar and was shouting and screaming about it,” he said.

“He was really blase when he got a knife out of his bag, I couldn’t believe it.

“I shouted to all the customers to get back inside and after that, it was all a bit of a blur.

“I remember the two guards from Club 147 running over to help me and between us all, we detained the man until police arrived.”

He added: “It was pretty scary and I was left quite shaken. I really can’t thank Jay and Rich enough.”

Chris O’Neal, who runs Bangor-based IPP Security, also praised his “selfless” staff. He said: “Without any thought for their own personal safety, Rich and Jay ran over to help by creeping up behind the knife wielding thug and wrestling him to the floor until the police arrived.

“I have no doubt that if the lads hadn’t have acted so fast, then someone could easily have been killed.”

He added: “People will say don't be a hero in situations like this, but I’m greatly thankful to Rich and Jay for their actions that have undoubtedly saved someone’s life.”

A North Wales Police spokesman said: “We were called to a disturbance in Mostyn Street at 11.36pm on Friday December 20. One man was arrested on suspicion of wounding. The victim sustained a minor injury.”